$x\left(\frac{dy}{dx}+1\right)=x^3-2y$

$-9+5-2-\left[4+3-\left(7+6-9\right)+5\right]-4$

$4z^2-16=36$

$\sin\left(a\right)^4=\frac{1-\cos\:\left(a\right)^2}{\csc\left(a\right)^2}$

$\lim_{y\to2}\:\frac{\left(y^3-8\right)}{2y^2-7y+12}$

$\left(z^2+y\right)\left(z^2-y\right)$

$5ab+8ab+\left(-2ab\right)$